PLSclear is a facilitator but is not the licensor. Permissions granted through PLSclear are between the publisher and you.
Some publishers have their permissions managed by PLS on their behalf. If this is the case, the permissions policies and prices for requests are still set by the publisher but are administered by PLS.
PLS cannot advise publishers on pricing. Fees are calculated based on several factors and are entirely at the discretion of the publisher. If you need to negotiate your fee, please leave a comment in your request for the publisher to review as the PLSclear team does not have any influence on prices quoted.